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Bearing Capacity Chart - Delmag Diesel Pile Hammers

Delmag D8-22 Single Acting Diesel Pile Hammer
Bearing Capacity ( tons ) for a Pile Set ( blows / in ) of:
Blows Per Min. Pistion Stroke (ft) Hammer Energy (ft-lbs) 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0
54 4.65 8193 53 61 67 72 77 81 85 88 91 94 96 99 101 103 105 107 108
53 4.84 8528 55 63 69 75 79 84 87 91 94 96 99 102 104 106 108 110 112
52 5.04 8880 57 65 72 77 82 86 90 94 97 99 102 105 107 109 111 113 115
51 5.25 9251 59 68 74 80 85 89 93 96 100 103 105 108 110 112 114 116 118
50 5.47 9638 62 70 77 83 88 92 96 100 103 106 108 111 113 116 118 120 122
49 5.71 10061 64 73 80 86 91 95 99 103 106 109 112 115 117 119 122 124 126
48 5.97 10519 67 75 83 89 94 98 102 106 110 113 116 118 121 123 125 127 129
47 6.24 10995 69 78 86 92 97 102 106 110 113 116 119 122 125 127 129 131 133
46 6.52 11488 72 81 89 95 100 105 109 113 117 120 123 126 128 131 133 135 138
45 6.83 12034 75 84 92 98 104 109 113 117 121 124 127 130 133 135 138 140 142
44 7.16 12616 78 87 95 102 107 112 117 121 125 128 131 134 137 140 142 144 147
43 7.51 13233 81 91 99 105 111 116 121 125 129 132 136 139 142 144 147 149 151
42 7.88 13885 84 94 102 109 115 120 125 129 133 137 140 143 146 149 151 154 156
41 8.29 14607 88 98 106 113 119 125 130 134 138 142 145 148 151 154 157 159 162
40 8.72 15365 91 102 110 117 124 129 134 139 143 147 150 153 156 159 162 165 167
39 9.19 16193 95 106 114 122 128 134 139 144 148 152 155 159 162 165 168 170 173
38 9.70 17091 99 110 119 127 133 139 144 149 153 157 161 164 168 171 174 176 179
37 10.25 18061 103 114 124 132 138 144 150 155 159 163 167 170 174 177 180 183 185
36 10.84 19100 107 119 129 137 144 150 155 160 165 169 173 177 180 183 186 189 192
35 11.48 20228 112 124 134 142 149 156 161 167 171 176 180 183 187 190 193 196 199

Calculates bearing capacities based upon FHWA modified Gates formula:
Ru = 0.5 [ 1.75 √E ( log 10N ) - 100 ]
where
Ru = Driven bearing capacity of the pile in tons
N = Number of hammer blows per inch
E = Energy developed by the hammer per blow in ft-lbs

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